WO2021179450A1 - 一种鼻胃管结构及其加工模具和加工方法 - Google Patents

一种鼻胃管结构及其加工模具和加工方法 Download PDF

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Publication number
WO2021179450A1
WO2021179450A1 PCT/CN2020/094544 CN2020094544W WO2021179450A1 WO 2021179450 A1 WO2021179450 A1 WO 2021179450A1 CN 2020094544 W CN2020094544 W CN 2020094544W WO 2021179450 A1 WO2021179450 A1 WO 2021179450A1
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WIPO (PCT)
Prior art keywords
nasogastric tube
tube structure
mold
catheter
core
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PCT/CN2020/094544
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English (en)
French (fr)
Inventor
张景州
吕秀波
掌效
黄继鹏
秦宏平
张庆军
彭家启
Original Assignee
江苏苏云医疗器材有限公司
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Publication of WO2021179450A1 publication Critical patent/WO2021179450A1/zh

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J15/00—Feeding-tubes for therapeutic purposes
    • A61J15/0003—Nasal or oral feeding-tubes, e.g. tube entering body through nose or mouth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J15/00—Feeding-tubes for therapeutic purposes
    • A61J15/0026—Parts, details or accessories for feeding-tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/304—Extrusion nozzles or dies specially adapted for bringing together components, e.g. melts within the die

Definitions

  • the invention belongs to the technical field of medical materials, and in particular relates to a nasogastric tube structure and its processing mold and processing method.
  • the contrast line 2 of the nasogastric tube currently used in clinical practice runs through the inner and outer walls of the catheter 1.
  • the nasogastric tube has been used clinically for 42 days. During these 42 days, food and nutrient solutions repeatedly pass through the nasogastric tube Later, the penetrating nasogastric tube structure is not completely covered by the polyurethane material of the tube body of the catheter 1 because the material of the contrast line 2 is not completely covered. Under the repeated erosion of enteral nutrient solution, the nasogastric tube body is easy to be at the junction of the contrast line 2 When cracking occurs, the nasogastric tube can only be replaced and re-intubated when this happens.
  • the inventors of the present invention actively research and innovate based on years of rich practical experience and professional knowledge engaged in the engineering application of such products, coupled with the application of academic theory, in order to create a nasogastric tube structure and its processing mold and processing method. Make it more practical.
  • the problem to be solved by the present invention is to provide a nasogastric tube structure, thereby effectively solving the problems in the background art.
  • the present invention also provides a processing mold and a processing method for the nasogastric tube structure, which have the same technical effect.
  • a nasogastric tube structure includes a catheter and a contrast line running through the length direction thereof, and the contrast line is wrapped inside the catheter material.
  • the cross section of the contrast line perpendicular to the length direction has a smooth contour.
  • the rounded contour has a first extension direction and a second extension direction perpendicular to each other, the second extension direction coincides with the radial direction of the catheter, and the extension length of the second extension direction is less than that of the first extension direction.
  • the extension length in the extension direction is less than that of the first extension direction.
  • the rounded contour is symmetrically arranged with respect to the second extension direction.
  • the midpoint of the line of symmetry of the rounded contour in the second extending direction is located at the center of the inner wall and the outer wall of the catheter.
  • a processing mold for nasogastric tube structure including a mold core base and a mold core;
  • the core base has a first discharging channel, and the material from the first discharging channel is used to shape the catheter of the nasogastric tube structure.
  • the core base also includes a second discharging channel from the The material 2 of the second discharging channel is used to shape the contrast line of the nasogastric tube structure, the first discharging channel and the second discharging channel are both arranged on the periphery of the mold core, and the second discharging channel
  • the material outlet of the material channel is arranged within the traveling range of the material one in the process of being extruded.
  • a through ring hole is provided on the mold core base around the mold core for the material to circulate, and the material outlet of the first discharge channel is located at the ring hole and faces the ring hole.
  • a number of connecting plates are evenly distributed around the axis of the mold core in the annular hole.
  • contour line of the end of the mold core coincides with the contour line of the inner wall of the edge of the annular hole.
  • the connecting plate has a uniform thickness in the radial direction of the mold core.
  • the thickness of the connecting plate is uniformly arranged in the axial direction of the core base.
  • the thickness of the connecting plate is reduced in the radial direction of the core base toward the core.
  • the reduction of the thickness of the connecting plate is carried out uniformly.
  • the mold core includes a truncated cone section connected with the mold core base, and a cylindrical section that smoothly transitions to the side with a smaller diameter of the truncated cone section, and the material outlet of the second discharge channel is in the The projection of the axial direction of the core is located within the projection range of the side wall of the truncated section.
  • the projection of the material outlet of the second discharge channel in the axial direction of the mold core is located at the center of the projection range of the truncated section.
  • the second discharge channel penetrates the core base, the connecting plate and the truncated cone section.
  • the mold core further includes a second truncated cone section arranged on the other side of the cylindrical section.
  • the second discharge channel extends to the outside of the truncated section.
  • the second discharge channel extends to the junction of the cylindrical section and the second truncated section.
  • cross section of the material outlet of the second discharging channel is circular.
  • a through air passage is provided inside the mold core, and the air passage communicates the inside of the duct with the atmospheric environment.
  • the air passage penetrates the core base and the connecting plate.
  • a through hole is provided on the mold core base inside the annular hole, one side of the through hole is connected to the outer wall of the mold core, and an air seal structure is provided on the other side of the through hole A part of the air passage communicates with the inside of the through hole and the atmospheric environment.
  • annular groove is provided on the end surface where the mold core base and the mold core are attached, and the annular groove is a part of the second discharge channel.
  • a processing method of nasogastric tube structure includes the following steps:
  • S1 Supply material 1 for forming the catheter of the nasogastric tube in a ring;
  • the discharge port of the second material is located in the middle position of the inner and outer circles of the ring.
  • the inside of the duct is in communication with the atmosphere.
  • the material of the contrast line can be protected by the above method.
  • the junction between the catheter and the contrast line material is set inside the catheter, which can avoid the erosion of enteral nutrient solution, thereby avoiding the cracking phenomenon of the nasogastric tube body. It reduces the pain of patients, and on the other hand, it effectively reduces the work intensity of medical staff.
  • the present invention also provides a nasogastric tube structure processing mold, which can realize the processing of the required nasogastric tube structure.
  • the structure is simple, and the produced product is stable and reliable.
  • a nasogastric tube is also claimed in the present invention.
  • the processing method of the structure has the same technical effect as the above.
  • Figure 1 is a cross-sectional view of the existing nasogastric tube structure in the background art
  • Figure 2 is a cross-sectional view of the nasogastric tube structure of the present invention.
  • Figure 3 is a schematic cross-sectional view of the contrast line
  • Figure 4 is another schematic cross-sectional view of the contrast line
  • Figure 5 is a schematic diagram of a structure of the core base
  • FIG. 6 is a schematic diagram of the connection between the mold core base and the mold core in FIG. 5;
  • Fig. 7 is an enlarged view of the mold core in Fig. 6;
  • Figure 8 is a cross-sectional view of Figure 6;
  • Fig. 9 is a schematic diagram after optimizing the mold core in Fig. 6;
  • FIG. 10 is a schematic diagram after optimizing the second discharge channel in FIG. 9;
  • Figure 11 is an enlarged view of the mold core in Figure 10;
  • Figure 12 is a partial enlarged view of A in Figure 11;
  • Figure 13 is a schematic diagram of an optimized structure of the core base
  • Fig. 14 is a partial enlarged view at B in Fig. 13;
  • Figure 15 is a schematic diagram of the installation of the air seal structure
  • catheter 1 contrast line 2
  • first extension direction A second extension direction B
  • core base 3 first discharge channel 31, second discharge channel 32
  • connecting plate 33 through hole 34
  • connection should be interpreted broadly unless otherwise clearly specified and limited.
  • it can be a fixed connection or a detachable connection. , Or one-piece connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication between two components.
  • connection should be interpreted broadly unless otherwise clearly specified and limited.
  • it can be a fixed connection or a detachable connection. , Or one-piece connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication between two components.
  • This embodiment is written in a progressive manner.
  • a nasogastric tube structure includes a catheter 1 and a contrast line 2 passing through the length direction thereof, and the contrast line 2 is wrapped in the material of the catheter 1.
  • the material of the contrast line 2 can be protected by the above method.
  • the junction of the material of the catheter 1 and the contrast line 2 is set inside the catheter 1, which can avoid the erosion of enteral nutrient solution, thereby avoiding the cracking of the nasogastric tube. It reduces the pain of patients, and on the other hand, it effectively reduces the work intensity of medical staff.
  • the cross-section of the contrast line 2 perpendicular to the length direction has a smooth contour.
  • the smooth contour form makes the excess of the two materials of the catheter 1 and the contrast line 2 softer. This method can increase the affinity of the two materials, thereby further improving the nose
  • the service life of the gastric tube at the same time, the smooth contour is easier to control during the forming process, which can simplify the processing process.
  • the rounded profile has a first extension direction A and a second extension direction B perpendicular to each other, the second extension direction B coincides with the radial direction of the catheter 1, and the second extension direction
  • the extension length of B is smaller than the extension length of the first extension direction A.
  • the contrast line 2 extends as far as possible along the first extension direction A perpendicular to the radial direction, so as to reduce the difficulty of determining the position of the nasogastric tube and increase the accuracy of the determination.
  • the smooth contour is symmetrically arranged with respect to the second extension direction B.
  • This structure form can effectively reduce the processing difficulty of the contrast line 2.
  • the midpoint of the line of symmetry of the smooth contour in the second extension direction B is located at the center between the inner wall and the outer wall of the catheter 1, so as to ensure that the material thickness of the catheter 1 inside and outside the contrast line 2 is more balanced, and the stability of the nasogastric tube structure is improved .
  • Fig. 3 shows a form in which the rounded contour is also symmetrically arranged with respect to the first extension direction A.
  • This form is difficult to guarantee in the actual production process.
  • the ring contour in Fig. 4 can be used in the present invention.
  • the extension direction be bent adaptively to the annular contour of the catheter 1.
  • a processing mold for the nasogastric tube structure includes a core base 3 and a core 4; the core base 3 has a first discharge channel 31, and the material from the first discharge channel 31 is used for the nasogastric tube structure
  • the catheter 1 is formed, and the core base 3 also includes a second discharge channel 32.
  • the material 2 from the second discharge channel 32 is used to shape the contrast line 2 of the nasogastric tube structure.
  • the two discharging channels 32 are both arranged on the periphery of the mold core 4, and the material outlet of the second discharging channel 32 is arranged within the traveling range of the material one during the extrusion process.
  • the processing mold of the nasogastric tube structure in this embodiment provides material one and material two through the first discharge channel 31 and the second discharge channel 32, respectively, so that the catheter 1 and the contrast line 2 can obtain a clear interface, and because The two forms an integrated structure through synchronous discharging during the molding process, which can further improve the stability of the structure and prolong the service life.
  • the core base 3 is provided with a through annular hole around the core 4, which is used for the flow of materials, and the first discharge channel
  • the material outlet of 31 is located on the side of the annular hole facing the mold core 4, and a number of connecting plates 33 are evenly distributed around the axis of the mold core 4 in the annular hole.
  • One end of the ring hole is for the material to enter, and the other end of the ring hole is for the material to flow out.
  • the extruded material extends outward in a ring shape under the restriction of the ring hole and the core 4, and the connecting plate 33 is paired. The inside and outside of the annular hole are connected.
  • the material one can also be stirred to make the material one extrude more evenly.
  • the gap between the materials caused by 33 will be filled quickly, thus forming a complete ring-shaped catheter 1.
  • the thickness of the tube wall of the catheter 1 is related to the width of the ring hole, and the inner diameter of the catheter 1 is related to the outer diameter of the core 4 .
  • the contour line 44 of the end of the core 4 coincides with the contour line of the inner wall of the edge of the annular hole.
  • the thickness of the connecting plate 33 in the radial direction of the core 4 is Set evenly.
  • the connecting plate 33 is provided with uniform thickness in the axial direction of the core base 3, which is convenient for processing.
  • the thickness of the core 4 is reduced in the radial direction, so that the material can gradually return to a uniform state as soon as the material passes through the connecting plate 33.
  • the thickness of the connecting plate 33 is reduced uniformly. A more preferred state.
  • the core 4 includes a truncated cone section 41 connected with the core base 3, and a cylindrical section 42 that smoothly transitions to the smaller diameter side of the truncated cone section 41.
  • the material outlet of the second discharge channel 32 is The projection of the core 4 in the axial direction is within the projection range of the side wall of the truncated section 41.
  • the material can be guided once it flows out from the annular hole, and the material will retract to a certain extent during the guiding process, so as to ensure the formed duct 1.
  • Dimensional stability During this process, the material two from the material outlet of the second discharging channel 32 injects material two into the ring body that has been preliminarily formed. Contrast line 2, the two are formed together, which can effectively ensure the stability of the final product.
  • the projection of the material outlet of the second discharge channel 32 in the axial direction of the core 4 is located at the center of the projection range of the truncated section 41, so as to ensure that the material thickness of the catheter 1 inside and outside the contrast line 2 is more balanced, and the nasogastric tube is improved.
  • the stability of the structure is preferable that the projection of the material outlet of the second discharge channel 32 in the axial direction of the core 4 is located at the center of the projection range of the truncated section 41, so as to ensure that the material thickness of the catheter 1 inside and outside the contrast line 2 is more balanced, and the nasogastric tube is improved.
  • the second discharge channel 32 penetrates the core base 3, the connecting plate 33 and the truncated section 41, so as to be arranged separately from the first discharge channel 31, which is convenient for material one and material two. Are supplied separately.
  • the cylindrical section 42 can realize the shaping of the size of the duct 1.
  • the duct 1 passing through this section forms an inner contour of the same size as the outer wall, in order to reduce the friction force during the extrusion of the duct 1, as shown in Figure 9
  • the mold core 4 also includes a second truncated cone section 43 arranged on the other side of the cylindrical section 42. The gradual shrinkage of the second truncated cone section 43 separates the mold core 4 from the inner wall of the duct 1 and shortens the time during which the duct 1 is subjected to friction. Ensure smoother processing.
  • the second discharge channel 32 extends to the outside of the truncated section 41, so that during the first forming process of the catheter 1, the second discharge channel 32 can be supported by the second discharge channel 32 to obtain an imaging
  • the space of the line 2 is stabilized within a certain distance, so that after the material 2 flows out of the second discharge channel 32, the space can be more effectively filled into this space and a stable shape can also be obtained.
  • the second discharge channel 32 extends to the junction of the cylindrical section 42 and the second truncated section 43.
  • the cross section of the material outlet of the second discharge channel 32 is circular. This cross-sectional shape is easier to process.
  • the cylindrical space originally supported by the second discharge channel 32 is compressed by the material to form an approximate ellipse due to the retraction of the material, so that the material is Extrusion and extension to obtain a larger observation area.
  • the two materials are extruded to make the two better connected.
  • a through air passage 45 is provided inside the mold core 4, and the air passage 45 communicates the inside of the duct 1 and the atmosphere.
  • the air passage 45 penetrates the core base 3 and the connecting plate 33. Similarly, this arrangement can also avoid the influence of the entire air passage on the first discharge channel 31 and the second discharge channel 32, and reduce the processing difficulty.
  • the core base 3 is provided with a through hole 34 located inside the annular hole.
  • One side of the through hole 34 is connected to the outer wall of the core 4, and the through hole 34 is another
  • An air seal structure 5 is provided on one side, and a part of the air passage 45 communicates with the inside of the through hole 34 and the atmosphere.
  • the mold core 4 and the through hole 34 can be connected by threads.
  • the air seal structure 5 can also be installed in this way.
  • other connection methods such as interference fit extrusion methods, etc., It is also within the protection scope of the present invention.
  • the air seal structure 5 can be used to provide a fixed position for the processing mold, and it can also facilitate the cleaning of the entire processing mold after it is removed.
  • the air passage 45 used to ensure the air pressure on the inner wall of the duct 1 communicates with the through hole 34 and the atmosphere, and can communicate with the inside of the duct 1 through a through passage located inside the mold core 4.
  • annular groove 35 is provided on the end surface where the mold core base 3 and the mold core 4 are attached, and the annular groove 35 is a part of the second discharge channel 32.
  • the trough 35 receives the replenishment of material two, and the feed inlet of the annular groove 35 can be flexibly selected.
  • a processing method of nasogastric tube structure includes the following steps:
  • S1 Supply material 1 for forming the catheter 1 of the nasogastric tube in a ring;
  • the discharge port of the second material is located in the middle position between the inner and outer circles of the ring.
  • the inside of the duct 1 is in communication with the atmosphere.

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Abstract

一种鼻胃管结构，包括导管(1)以及贯穿其长度方向的造影线(2)，造影线(2)包覆于导管(1)材料内部。可对造影线(2)的材料进行保护，导管(1)和造影线(2)材料的交界处设置于导管(1)内部，可避免肠营养液的侵蚀，从而避免鼻胃管管身的开裂现象，一方面减少了患者的痛苦，另一方面也有效降低了医护人员的工作强度。还提供一种鼻胃管结构的加工模具和一种鼻胃管结构的加工方法，可实现所需鼻胃管结构的加工，结构简单，且所生产产品稳定且可靠。

Description

一种鼻胃管结构及其加工模具和加工方法 技术领域
本发明属于医用材料技术领域，具体涉及一种鼻胃管结构及其加工模具和加工方法。
背景技术
如图1所示，目前临床上使用的鼻胃管的造影线2贯穿导管1内外壁，鼻胃管临床使用时间长达42天，在这42天里，食物、营养液反复通过鼻胃管后，这种贯穿鼻胃管结构因造影线2的材料没有被导管1的管身主体的聚氨酯材料完全包覆，在肠营养液反复侵蚀下，鼻胃管管身易在造影线2结合处出现开裂，此种情况发生时只能更换鼻胃管，并重新插管。
临床上，医生在导管的插入的过程中，需耗费较长时间，尤其对要插入十二指肠的患者，导管穿过幽门就更加困难；此外，对于长期需要鼻饲的患者，频繁地更换导管会给患者带来痛苦，也增加医务人员的工作量。
鉴于上述情况，本发明人基于从事此类产品工程应用多年丰富的实务经验及专业知识，并配合学理的运用，积极加以研究创新，以期创设一种鼻胃管结构及其加工模具和加工方法，使其更具有实用性。
发明内容
本发明要解决的问题是提供一种鼻胃管结构，从而有效解决背景技术中的问题。同时本发明中还提供了鼻胃管结构的加工模具和加工方法，具有同样的技术效果。
为了达到上述目的，本发明所采用的技术方案是：
一种鼻胃管结构，包括导管以及贯穿其长度方向的造影线，所述造影线包覆于所述导管材料内部。
进一步地，所述造影线垂直于长度方向的截面具有圆滑轮廓。
进一步地，所述圆滑轮廓具有相互垂直的第一延伸方向和第二延伸方向，所述第二延伸方向与所述导管的径向重合，所述第二延伸方向的延伸长度小于所述第一延伸方向的延伸长度。
进一步地，所述圆滑轮廓关于所述第二延伸方向对称设置。
进一步地，所述圆滑轮廓在第二延伸方向上的对称线中点位于所述导管内壁和外壁的中心位置处。
一种鼻胃管结构的加工模具，包括模芯底座和模芯；
所述模芯底座具有第一出料通道，来自所述第一出料通道的物料一用于对鼻胃管结构的导管进行成型，所述模芯底座还包括第二出料通道，来自所述第二出料通道的物料二用于对鼻胃管结构的造影线进行成型，所述第一出料通道和第二出料通道均设置于所述模芯的外围，所述第二出料通道的物料出口设置于所述物料一在被挤出过程中的行进范围内。
进一步地，所述模芯底座上围绕所述模芯设置有贯通的环形孔位，用于供所述物料一流通，所述第一出料通道的物料出口位于所述环形孔位朝向所述模芯的一侧，所述环形孔位内围绕所述模芯的轴线均匀分布有若干连接板。
进一步地，所述模芯的端部轮廓线与所述环形孔位边缘的内壁轮廓线重合。
进一步地，所述连接板在所述模芯径向方向上厚度均匀设置。
进一步地，所述连接板在所述模芯底座的轴向方向上厚度均匀设置。
进一步地，所述连接板在所述模芯底座朝向所述模芯的径向方向上厚度减小。
进一步地，所述连接板厚度的减小均匀进行。
进一步地，所述模芯包括与所述模芯底座连接的圆台段，以及与所述圆台段的直径较小一侧平滑过渡的圆柱段，所述第二出料通道的物料出口在所述模芯轴向方向的投影位于所述圆台段的侧壁投影范围内。
进一步地，所述第二出料通道的物料出口在所述模芯轴向方向的投影位于所述圆台段投影范围的中心位置。
进一步地，所述第二出料通道贯穿所述模芯底座、连接板和所述圆台段。
进一步地，所述模芯还包括设置于所述圆柱段另一侧的第二圆台段。
进一步地，所述第二出料通道延伸至所述圆台段外部。
进一步地，所述第二出料通道延伸至所述圆柱段和第二圆台段的交界处。
进一步地，所述第二出料通道的物料出口截面为圆形。
进一步地，所述模芯内部设置有贯通的气道，所述气道联通所述导管内部和大气环境。
进一步地，所述气道贯穿所述模芯底座和连接板。
进一步地，所述模芯底座上位于所述环形孔位内侧设置有贯通孔位， 所述贯通孔位一侧与所述模芯外壁连接，所述贯通孔位另一侧设置有气封结构，所述气道一部分联通所述贯通孔位内部和大气环境。
进一步地，所述模芯底座与所述模芯贴合的端面上设置有环形凹槽，所述环形凹槽为第二出料通道的一部分。
一种鼻胃管结构的加工方法，包括以下步骤：
S1：成环状供应对鼻胃管的导管进行成型的物料一；
S2：以所述物料一被挤出的行进过程中的设定位置开始，在其内部沿所述导管轴线方向连续注入对所述鼻胃管的造影线进行成型的物料二，所述物料一和物料二的流速相等。
进一步地，所述物料二的出料口位于所述环状的内外圆的中间位置。
进一步地，在加工过程中，所述导管内部与大气联通。
通过上述技术方案，本发明的有益效果是：
本发明中，通过上述方式可对造影线的材料进行保护，导管和造影线材料的交界处设置于导管内部，可避免肠营养液的侵蚀，从而避免鼻胃管管身的开裂现象，一方面减少了患者的痛苦，另一方面也有效降低了医护人员的工作强度。本发明中还提供一种鼻胃管结构的加工模具，可实现所需鼻胃管结构的加工，结构简单，且所生产产品稳定且可靠，此外，本发明中还请求保护一种鼻胃管结构的加工方法，具有上述同样的技术效果。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地， 下面描述中的附图仅仅是本发明中记载的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为背景技术中现有鼻胃管结构的剖视图；
图2为本发明中鼻胃管结构的剖视图；
图3为造影线的一种截面示意图；
图4为造影线的另一种截面示意图；
图5为模芯底座的一种结构示意图；
图6为图5中模芯底座与模芯的连接示意图；
图7为图6中模芯的放大图；
图8为图6的剖视图；
图9为对图6中的模芯进行优化后的示意图；
图10为对图9中第二出料通道优化后的示意图；
图11为图10中模芯的放大图；
图12为图11中A处的局部放大图；
图13为模芯底座的一种优化结构示意图；
图14为图13中B处的局部放大图；
图15为气封结构的安装示意图；
附图标记：导管1、造影线2、第一延伸方向A、第二延伸方向B、模芯底座3、第一出料通道31、第二出料通道32、连接板33、贯通孔位34、环形凹槽35、模芯4、圆台段41、圆柱段42、第二圆台段43、端部轮廓线 44、气道45、气封结构5。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。
在本发明的描述中，需要说明的是，属于“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或者位置关系为基于附图所示的方位或者位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如可以是固定连接，也可以是可拆卸连接，或一体式连接；可以是机械连接，也可以是电连接；可以是直接连接，也可以是通过中间媒介间接连接，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。
本实施例采用递进的方式撰写。
如图2所示，一种鼻胃管结构，包括导管1以及贯穿其长度方向的造影线2，造影线2包覆于导管1材料内部。通过上述方式可对造影线2的材料进行保护，导管1和造影线2材料的交界处设置于导管1内部，可避免肠营养液的侵蚀，从而避免鼻胃管管身的开裂现象，一方面减少了患者的 痛苦，另一方面也有效降低了医护人员的工作强度。
造影线2垂直于长度方向的截面具有圆滑轮廓，圆滑的轮廓形式使得导管1和造影线2两种材料的过度更加柔和，此种方式可增加两种材料的亲和性，从而进一步的提升鼻胃管的使用寿命；同时，圆滑轮廓在成型过程中也更容易控制，可使得加工过程得到简化。
作为上述实施例的优选，如图3和4所示，圆滑轮廓具有相互垂直的第一延伸方向A和第二延伸方向B，第二延伸方向B与导管1的径向重合，第二延伸方向B的延伸长度小于第一延伸方向A的延伸长度。在使用的过程中，造影线2用于观察鼻胃管的位置，在导管1尺寸固定的情况下，延伸面积越大的造影线2会越有助于观察，因此，在导管1厚度一定时，优选造影线2沿与径向垂直的第一延伸方向A尽可能的延伸，从而降低鼻胃管位置判断的难度并增加判断的准确性。
其中，为了减低鼻胃管结构的加工难度，圆滑轮廓关于第二延伸方向B对称设置，此种结构形式可有效的降低造影线2的加工难度。圆滑轮廓在第二延伸方向B上的对称线中点位于导管1内壁和外壁之间的中心位置处，从而保证造影线2内外的导管1的材料厚度较为均衡，提高鼻胃管结构的稳定性。
其中，图3中展示了圆滑轮廓关于第一延伸方向A也对称设置的形式，此种形式在实际生产的过程中难以保证的，为了降低加工难度，本发明中可采用图4中圆环轮廓关于第一延伸方向A不对称的形式，当然在此中形式下，优选使其延伸方向与导管1的环形轮廓适应性的弯曲。
一种鼻胃管结构的加工模具，包括模芯底座3和模芯4；模芯底座3具有第一出料通道31，来自第一出料通道31的物料一用于对鼻胃管结构的导管1进行成型，模芯底座3还包括第二出料通道32，来自第二出料通道32的物料二用于对鼻胃管结构的造影线2进行成型，第一出料通道31和第二出料通道32均设置于模芯4的外围，第二出料通道32的物料出口设置于物料一在被挤出过程中的行进范围内。
本实施例中的鼻胃管结构的加工模具通过第一出料通道31和第二出料通道32分别提供物料一和物料二，使得导管1和造影线2可获得明确的分界面，同时由于二者在成型过程中通过同步的出料而形成一体化的结构，可进一步的提升结构的稳定性，延长使用寿命。
如图5所示，展示了一种模芯底座3的结构形式，具体地，模芯底座3上围绕模芯4设置有贯通的环形孔位，用于供物料一流通，第一出料通道31的物料出口位于环形孔位朝向模芯4的一侧，环形孔位内围绕模芯4的轴线均匀分布有若干连接板33。环形孔位一端供物料一进入，环形孔位的另一端供物料一流出，其中，挤出的物料一在环形孔位和模芯4的限制下成环状的向外延伸，连接板33对环形孔位内外进行连接，在物料一挤出的过程中，还可实现物料一的搅拌，使得物料一更为均匀地挤出，由于物料一自环形孔位流出后尚未定型，因此因连接板33而导致的材料间缝隙会快速的被填充，从而形成完整的环状的导管1，导管1的管壁厚度与环形孔位的宽度相关，而导管1的内径与模芯4的外径相关。
如图6所示，模芯4的端部轮廓线44与环形孔位边缘的内壁轮廓线重 合。通过上述结构的优化，旨在形成更为光滑的导管1的内壁，当物料一自第一出料通道31的物料出口流出后，通过上述边缘的对接而平滑过渡，不会因流通截面的突变而对最终的成型造成影响。
在加工的过程中，由于连接板33会对物料一的流通造成阻碍，为了在物料一经过连接板33后能够快速的恢复均匀的环状状态，连接板33在模芯4径向方向上厚度均匀设置。
作为上述实施例的优选，连接板33在模芯底座3的轴向方向上厚度均匀设置，此种方式便于加工，但是为了提升导管1材料的均匀性，连接板33在模芯底座3朝向模芯4的径向方向上厚度减小，从而在物料一经过连接板33的过程中即可逐渐的恢复均匀的状态，当然此种形式下，连接板33厚度的减小均匀进行，是一种更为优选的状态。
作为上述实施例的优选，模芯4包括与模芯底座3连接的圆台段41，以及与圆台段41的直径较小一侧平滑过渡的圆柱段42，第二出料通道32的物料出口在模芯4轴向方向的投影位于圆台段41的侧壁投影范围内。
如图6和7所示，通过圆台段41的设置，使得物料一在自环形孔位流出后可获得导向，且在导向过程中材料会在一定程度上回缩，从而可确保成型后的导管1的尺寸稳定性，在此过程中来自第二出料通道32物料出口的物料二向已经初步成型的环状体内部注入物料二，物料二会与物料一公共挤出而在导管1内部形成造影线2，二者共同成型，可有效保证最终产品的稳定性。
其中，优选第二出料通道32的物料出口在模芯4轴向方向的投影位于 圆台段41投影范围的中心位置，从而保证造影线2内外的导管1的材料厚度较为均衡，提高鼻胃管结构的稳定性。
作为上述实施例的优选，如图8所示，第二出料通道32贯穿模芯底座3、连接板33和圆台段41，从而与第一出料通道31分开设置，便于物料一和物料二的分别供应。
在加工的过程中，圆柱段42可实现导管1尺寸的定型，经过此段的导管1形成了与其外壁等尺寸的内轮廓，为了在导管1挤出过程中降低摩擦力，如图9所示，模芯4还包括设置于圆柱段42另一侧的第二圆台段43，通过第二圆台段43的逐渐收缩而使得模芯4与导管1内壁分离，导管1受到摩擦力的时间缩短而保证更加顺畅的加工。
作为上述实施例的优选，第二出料通道32延伸至圆台段41外部，从而在导管1首先成型的过程中，可通过第二出料通道32在其内部的支撑而使得其内部获得设置造影线2的空间，并且在一段距离内使得此空间获得稳定，从而在物料二自第二出料通道32流出后可更有效的填充到此空间内并且还获得稳定的形状。其中如图10所示，优选第二出料通道32延伸至圆柱段42和第二圆台段43的交界处。当导管1与模芯4分离时，由于失去内部的支撑，必然存在一定的收缩趋势，在获得此收缩趋势时注入物料二，可使得物料二在导管1材料回缩的过程中快速且稳定的被包裹于物料一内，二者间的界面获得更加稳定的连接。
第二出料通道32的物料出口截面为圆形。此种截面形状更加容易加工，在导管1失去内部支撑时，由于材料的回缩使得原本由第二出料通道32支 撑的圆柱形空间被材料压缩而形成近似的椭圆形，从而使得物料二被挤压而延展，获得更大的观察面积，在上述形变的过程中，通过物料一对物料二的挤压使得二者更好的连接。
如图11和12所示，模芯4内部设置有贯通的气道45，气道45联通导管1内部和大气环境。通过将导管1内部与大气环境联通，可避免导管1内部因压力不足而造成扁瘪，从而保证成型效果。气道45贯穿模芯底座3和连接板33，同样的，此种设置形式同样可避免整个通气道对第一出料通道31和第二出料通道32造成的影响，降低加工难度。
作为上述实施例的优选，如图13～15所示，模芯底座3上位于环形孔位内侧设置有贯通孔位34，贯通孔位34一侧与模芯4外壁连接，贯通孔位34另一侧设置有气封结构5，气道45一部分联通贯通孔位34内部和大气环境。
在安装时，可通过螺纹对模芯4和贯通孔位34进行连接，同样的，气封结构5也可通过此种方式进行安装，当然其他的连接方式如过盈配合的挤压方式等，也在本发明的保护范围内。通过气封结构5的设置，可用于提供对加工模具的固定位置，也可在其移除后便于整个加工模具的清理。用于保证导管1内壁气压的气道45联通贯通孔位34和大气环境，并可通过位于模芯4内部的贯通通道来与导管1内部联通。
作为上述实施例的优选，模芯底座3与模芯4贴合的端面上设置有环形凹槽35，环形凹槽35为第二出料通道32的一部分。通过环形凹槽35的设置，可作为模芯底座3与模芯4内部物料二的中转空间，通过其设置可 在设置多条造影线2时，可保证多条供料通道均可从环形凹槽35获得物料二的补给，而环形凹槽35的入料口则可灵活选择。
一种鼻胃管结构的加工方法，包括以下步骤：
S1：成环状供应对鼻胃管的导管1进行成型的物料一；
S2：以物料一被挤出的行进过程中的设定位置开始，在其内部沿导管1轴线方向连续注入对鼻胃管的造影线2进行成型的物料二，物料一和物料二的流速相等。
其中，物料二的出料口位于所述环状的内外圆间的中间位置。在加工过程中，所述导管1内部与大气联通。
本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下，本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。

Claims (10)

  1. 一种鼻胃管结构，包括导管(1)以及贯穿其长度方向的造影线(2)，其特征在于，所述造影线(2)包覆于所述导管(1)材料内部。
  2. 一种鼻胃管结构的加工模具，其特征在于，包括模芯底座(3)和模芯(4)；
    所述模芯底座(3)具有第一出料通道(31)，来自所述第一出料通道(31)的物料一用于对鼻胃管结构的导管(1)进行成型，所述模芯底座(3)还包括第二出料通道(32)，来自所述第二出料通道(32)的物料二用于对鼻胃管结构的造影线(2)进行成型，所述第一出料通道(31)和第二出料通道(32)均设置于所述模芯(4)的外围，所述第二出料通道(32)的物料出口设置于所述物料一在被挤出过程中的行进范围内。
  3. 根据权利要求2所述的鼻胃管结构的加工模具，其特征在于，所述模芯底座(3)上围绕所述模芯(4)设置有贯通的环形孔位，用于供所述物料一流通，所述第一出料通道(31)的物料出口位于所述环形孔位朝向所述模芯(4)的一侧，所述环形孔位内围绕所述模芯(4)的轴线均匀分布有若干连接板(33)。
  4. 根据权利要求3所述的鼻胃管结构的加工模具，其特征在于，所述模芯(4)的端部轮廓线(44)与所述环形孔位边缘的内壁轮廓线重合。
  5. 根据权利要求2～4任一项所述的鼻胃管结构的加工模具，其特征在于，所述模芯(4)包括与所述模芯底座(3)连接的圆台段(41)，以及与所述圆台段(41)的直径较小一侧平滑过渡的圆柱段(42)，所述第二出料通道(32)的物料出口在所述模芯(4)轴向方向的投影位于所述圆台段(41) 的侧壁投影范围内。
  6. 根据权利要求5所述的鼻胃管结构的加工模具，其特征在于，所述第二出料通道(32)延伸至所述圆台段(41)外部。
  7. 根据权利要求3所述的鼻胃管结构的加工模具，其特征在于，所述模芯(4)内部设置有贯通的气道(45)，所述气道(45)联通所述导管(1)内部和大气环境。
  8. 根据权利要求7所述的鼻胃管结构的加工模具，其特征在于，所述模芯底座(3)上位于所述环形孔位内侧设置有贯通孔位(34)，所述贯通孔位(34)一侧与所述模芯(4)外壁连接，所述贯通孔位(34)另一侧设置有气封结构(5)，所述气道(45)一部分联通所述贯通孔位(34)内部和大气环境。
  9. 根据权利要求2～4、7、8中任一项所述的鼻胃管结构的加工模具，其特征在于，所述模芯底座(3)与所述模芯(4)贴合的端面上设置有环形凹槽(35)，所述环形凹槽(35)为第二出料通道(32)的一部分。
  10. 一种鼻胃管结构的加工方法，其特征在于，包括以下步骤：
    S1：成环状供应对鼻胃管的导管(1)进行成型的物料一；
    S2：以所述物料一被挤出的行进过程中的设定位置开始，在其内部沿所述导管(1)轴线方向连续注入对所述鼻胃管的造影线(2)进行成型的物料二，所述物料一和物料二的流速相等。
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